ASME_Y14-32-1M-1994.pdf

Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.AN AMERICAN NATIONAL STANDARD ENGINEERING DRAWING AND RELATED DOCUMENTATION PRACTICES Chassis Frames-Passenger Car and Light Truck-Ground Vehicle Practices ASME Y14.32.1M-1994(REVISION OF ANSI Y14.32.1-1974)The American Society of Mechanical Engineers 345 East 47th Street,New York,N.Y.1001 7 Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:January 31,1995 This Standard will be revised when the Society approves the issuance of a new edition.There will be no addenda or written interpretations of the re-quirements of this Standard issued to this edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate.The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorse any item,construction,proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent,nor assume any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representativek)or personk)affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol-unteers.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright 0 1995 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.(This Foreword is not part of ASME Y14.32.1M-1994.)Subcommittee 32 of the ASME Standards Committee Y14,Engineering Drawing and Re-lated Documentation Practices,was organized in 1968.The work of the Subcommittee re-sulted in the publication of the predecessor to this Standard,ANSI Y14.32.1-1974.During the ensuing years,the Y 14 Committee,reacting to the increasing acceptance of the SI metric system in the United States,began to systematically update its existing standards to accom-modate metric practices.Since Y 14 drafting practices in most cases are dimensionally insen-sitive,the majority of the metrication effort involved redrawing examples using metric units.ANSI Y14.32.1 was withdrawn as an American National Standard in 1987,at which time work on this Standard began.The vehicle chassis frame is typically an inseparable assembly of stamped or formed sheet metal structural members which support and locate the vehicle body,front sheet metal struc-ture,chassis components(wheel,suspension,engine,steering components,drive line,exhaust system,bumpers),and miscellaneous equipment.The chassis frame provides accuracy of lo-cation as well as strength and rigidity of support for these components to assure satisfactory vehicle performance.Functional criteria and restraints are determined from a number of sup-port drawings and a design check mock-up.These include a definition of mountings and clear-ances for all related chassis and underbody components,such as underbody and sheet metal structure,engine,drive line,exhaust,suspension systems,tires,brake lines,fuel lines,and bumpers.In addition to referencing metric(SI)units,this Standard includes the definition of some key terms which are generally accepted in the industries producing ground vehicles.Refer-ences are made specifically to automobiles,vans,and trucks where such distinctions are nec-essary.References to vehicles are inclusive of all types,as the concepts are generic.References to rear suspensions are more general than in the previous standard.Since 1974,the num